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Title: Breakup branches of Borromean beryllium-9

The breakup reaction {sup 9}Be({sup 4}He, 3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in {sup 9}Be up to 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in {sup 9}Be have been explored including the {sup 8}Be{sub g.s.} + n, {sup 8}Be{sub 2{sup +}} + n and {sup 5}He{sub g.s.} + {sup 4}He channels. By imposing the condition that the breakup proceeded via the {sup 8}Be ground state, clean excitation spectra for {sup 9}Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.
Authors:
; ; ; ; ; ; ; ;  [1] ; ; ; ; ; ; ; ; ;  [2] ; ;  [3] more »; « less
  1. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom)
  2. Institute for Structure and Nuclear Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)
  3. Department of Physics, University of Wisconsin - La Crosse, La Crosse, WI 54601 (United States)
Publication Date:
OSTI Identifier:
22492482
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1681; Journal Issue: 1; Conference: Nuclear Structure and Dynamics '15: 3. international nuclear physics conference on nuclear structure and dynamics, Portoroz (Slovenia), 14-19 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALPHA PARTICLES; BERYLLIUM 8; BERYLLIUM 9; BREAKUP REACTIONS; COMPUTERIZED SIMULATION; DECAY; EXCITATION; EXCITED STATES; GROUND STATES; HELIUM 4; HELIUM 5; MEV RANGE 10-100; MONTE CARLO METHOD; PARITY; SI SEMICONDUCTOR DETECTORS; SPIN